IEC TR 61439-0:2022

Low-voltage switchgear and controlgear assemblies- Part 0: Guidance to specifying assemblies

IEC TR 61439-0:2022 standards for low-voltage switchgear and controlgear assemblies, there are system and application details that are specified by the specifier to enable the manufacturer to produce an assembly that meets the needs and expectations of the specifier.
IEC/TR 61439-0:2022, identifies from the specifier’s perspective those functions and characteristics that are defined when specifying assemblies. It provides:
an explanation of the assembly characteristics and options within the IEC 61439 series;
a guidance on how to select the appropriate options and define characteristics so as to meet specific application needs; and
an assistance in the specification of assemblies.  References within this document to the interface characteristics of an assembly and the requirements with which they will comply assume that the assembly is designed, manufactured, and verified in accordance with the relevant part of the IEC 61439 series.
This third edition cancels and replaces the second edition published in 2013. It constitutes a technical revision.
This third edition includes the following significant technical changes with respect to the previous edition:  
alignment with IEC 61439-1:2020;
addition of new content in Clause 13 regarding current ratings;
addition of a new subclause 12.8.1 detailing the fundamentals of the forms of internal separation;
alignment of Annex B with Annex AA of 61439-2:2020;
removal of the annexes detailing items subject to agreement between specifier and manufacturer for all product parts as not all of them can always be up to date

Ensembles d'appareillage à basse tension - Partie 0: Recommandations pour la spécification d’ensembles

IEC TR 61439-0:2022 la série de normes IEC 61439 couvrant les ensembles d’appareillage à basse tension, certains détails de système et d’application sont spécifiés par le prescripteur afin de permettre au constructeur de produire un ensemble qui satisfait aux besoins et aux attentes du prescripteur.
L’IEC 61439-0:2022, identifie du point de vue du prescripteur les fonctions et les caractéristiques qui sont définies lors de la spécification des ensembles. Elle fournit:
une explication des caractéristiques et des options contenues dans la série IEC 61439;
des recommandations relatives à la manière de choisir les options appropriées et de définir des caractéristiques de manière à satisfaire aux besoins spécifiques de l’application; et
une aide à la spécification des ensembles.  Les références faites dans le présent document aux caractéristiques d’interface d’un ensemble et aux exigences auxquelles elles sont conformes partent du principe que l’ensemble est conçu, construit et vérifié conformément à la partie pertinente de la série IEC 61439.
Cette troisième édition annule et remplace la deuxième édition parue en 2013. Cette édition constitue une révision technique.
Cette troisième édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:  
alignement sur l’IEC 61439-1:2020;
ajout d’un nouveau contenu à l’Article 13 concernant les caractéristiques assignées de courant;
ajout d’un nouveau paragraphe 12.8.1 décrivant les principes fondamentaux des formes de séparation interne;
alignement de l’Annexe B sur l’Annexe AA de l’IEC 61439-2:2020;
suppression des annexes décrivant les sujets soumis à accord entre le prescripteur et le constructeur pour toutes les parties de produit, car elles ne peuvent pas toutes être toujours à jour.

Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 0. del: Navodila za specificiranje sestavov

V standardih IEC TR 61439-0:2022 za sestave nizkonapetostnih stikalnih in krmilnih naprav določevalec določi podrobnosti glede sistema in uporabe, na podlagi česar lahko proizvajalec izdela sestav, ki ustreza potrebam in pričakovanjem določevalca.
Standard IEC/TR 61439-0:2022 opredeljuje funkcije in lastnosti, ki se določijo pri specificiranju sestavov z vidika določevalca. Standard vključuje:
pojasnilo lastnosti sestava in možnosti v okviru skupine standardov IEC 61439;
smernice za izbiro ustreznih možnosti in določitev lastnosti, da bodo ustrezale posameznim potrebam glede uporabe; in
pomoč pri specificiranju sestavov.  Sklici na vmesniške lastnosti sestava v tem dokumentu in zahteve, ki jih morajo te lastnosti izpolnjevati, predpostavljajo, da je sestav zasnovan, proizveden in preverjen v skladu z ustreznim delom skupine standardov IEC 61439.
Tretja izdaja razveljavlja in nadomešča drugo izdajo, objavljeno leta 2013. Ta izdaja je tehnično popravljena izdaja.
Ta tretja izdaja vključuje naslednje znatne tehnične spremembe glede na prejšnjo izdajo:  
   uskladitev s standardom IEC 61439-1:2020;
   dodana nova vsebina v točki 13 glede trenutnih nazivnih tokov;
   dodana je nova podtočka 12.8.1, ki podrobno določa temelje oblik notranjega ločevanja;
   uskladitev dodatka B z dodatkom AA standarda 61439-2:2020;
   odstranjeni so dodatki, ki podrobno določajo elemente, ki so predmet dogovora med določevalcem in proizvajalcem, za vse dele izdelkov, saj vsi ne morejo biti ažurirani.

General Information

• Status: Published
• Publication Date: 21-Jul-2022
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: SC 121B - Low-voltage switchgear and controlgear assemblies
• Current Stage: PPUB - Publication issued
• Start Date: 23-Aug-2022
• Completion Date: 22-Jul-2022
• Ref Project: SIST-TP IEC TR 61439-0:2023 - Low-voltage switchgear and controlgear assemblies- Part 0: Guidance to specifying assemblies

Relations

• Revises: IEC TR 61439-0:2013 - Low-voltage switchgear and controlgear assemblies - Part 0: Guidance to specifying assemblies
• Effective Date: 05-Sep-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2023
Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 0. del: Navodila za
specificiranje sestavov
Low-voltage switchgear and controlgear assemblies- Part 0: Guidance to specifying
assemblies
Ensembles d'appareillage à basse tension - Partie 0: Recommandations pour la
spécification d’ensembles
Ta slovenski standard je istoveten z: IEC TR 61439-0:2022
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IEC TR 61439-0 ®
Edition 3.0 2022-07
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Low-voltage switchgear and controlgear assemblies –

Part 0: Guidance to specifying assemblies

Ensembles d’appareillage à basse tension –

Partie 0: Recommandations pour la spécification d’ensembles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-4027-4

– 2 – IEC TR 61439-0:2022 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Application of assemblies within the IEC 61439 series . 11
4.1 General . 11
4.2 Assembly design and verification . 11
4.3 Service conditions and interface characteristics . 13
4.4 Application design . 13
5 Electrical system . 13
5.1 General . 13
5.2 Earthing system . 13
5.3 Nominal voltage . 14
5.4 Transient overvoltages . 14
5.5 Unusual voltage transients, temporary overvoltages . 16
5.6 Rated frequency f (Hz) . 16
n
5.7 Additional on-site testing requirements: wiring, operational performance and
function . 17
6 Short-circuit withstand capability . 17
6.1 General . 17
6.2 Prospective short-circuit current at supply terminals I (kA) . 18
cp
6.3 Prospective short-circuit current in the neutral . 19
6.4 Prospective short-circuit current in the protective circuit . 19
6.5 Short-circuit protective device (SCPD) . 19
6.6 Coordination of short-circuit protective devices including external short-
circuit protective device details . 20
6.7 Data associated with loads likely to contribute to the short-circuit current . 21
6.8 Multiple supplies . 21
7 Protection of persons against electric shock . 21
7.1 General . 21
7.2 Basic protection (protection against direct contact) . 21
7.2.1 General . 21
7.2.2 Basic insulation provided by insulating material . 22
7.2.3 Basic insulation by barriers or enclosures . 22
7.3 Fault protection (protection against indirect contact) . 22
7.3.1 General . 22
7.3.2 Requirements for the protective conductor to facilitate automatic
disconnection of the supply . 23
7.3.3 Electrical separation . 24
7.3.4 Class II protection (double or reinforced insulation) . 24
8 Installation environment . 24
8.1 General . 24
8.2 Location type . 24
8.3 Protection against access to hazardous parts, ingress of solid foreign bodies
and ingress of water (IP code) . 25

8.4 External mechanical impact (IK code) . 28
8.5 Resistance to radiation . 29
8.5.1 General . 29
8.5.2 Solar irradiance . 29
8.5.3 Ultraviolet (UV) radiation . 29
8.6 Resistance to corrosion . 29
8.7 Ambient air temperature . 30
8.8 Maximum relative humidity . 30
8.9 Pollution degree . 31
8.10 Altitude . 32
8.11 Electromagnetic compatibility (EMC) . 32
8.12 Special service conditions . 33
8.12.1 General . 33
8.12.2 Climatic conditions . 34
8.12.3 Protection against ingress of solid foreign bodies and ingress of water
(IP code) . 34
8.12.4 Shock, vibration, seismic occurrence and external mechanical impact

(IK code) . 34
8.12.5 Fire and explosion hazards . 34
8.12.6 Exceptional overvoltages . 34
8.12.7 Polluted atmospheres . 35
8.12.8 EMC environment . 35
9 Installation method . 35
9.1 General . 35
9.2 Assembly type . 35
9.3 Portability . 36
9.4 Maximum overall dimensions and weight . 36
9.5 External conductor type(s) . 36
9.6 Direction(s) of external conductors . 37
9.7 External conductor material . 37
9.8 External line conductor, cross sections, and terminations . 37
9.9 External PE, N, PEN, PEM, PEL conductors’ cross sections, and
terminations . 37
9.10 Special terminal identification requirements . 38
10 Storage and handling. 38
10.1 General . 38
10.2 Maximum dimensions and weight of transport units . 38
10.3 Methods of transport (e.g. forklift, crane) . 38
10.4 Environmental conditions different from the service conditions . 39
10.5 Packing details . 39
11 Operating arrangements . 39
11.1 General . 39
11.2 Access to manually operated devices . 39
12 Maintenance and upgrade capabilities . 40
12.1 General . 40
12.2 Requirements related to accessibility for inspection and similar operations . 40
12.3 Requirements related to accessibility for maintenance in service by
authorized persons . 41
12.4 Requirements related to extension under voltage . 41

– 4 – IEC TR 61439-0:2022 © IEC 2022
12.5 Protection against direct contact with hazardous live internal parts during
maintenance or upgrade . 41
12.6 Method of functional unit connection . 42
12.7 Operating and maintenance gangways within an assembly . 42
12.8 Internal separation (only relevant for assemblies in accordance with

IEC 61439-2) . 42
12.8.1 Fundamentals of separation . 42
12.8.2 Considerations when determining a form of separation . 43
12.8.3 Selecting the most appropriate form of separation . 44
13 Current carrying capability . 46
13.1 General . 46
13.2 Rated current of the assembly I (A) (maximum current allowable) . 46
nA
13.3 Loading of outgoing circuits within an assembly . 47
13.4 Ratio of cross section of the neutral conductor to line conductors . 48
13.4.1 General . 48
13.4.2 Line conductors up to and including 16 mm . 48
13.4.3 Line conductors above 16 mm . 48
14 Assembly design and routine
...

IEC TR 61439-0 ®
Edition 3.0 2022-07
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Low-voltage switchgear and controlgear assemblies –
Part 0: Guidance to specifying assemblies

Ensembles d’appareillage à basse tension –
Partie 0: Recommandations pour la spécification d’ensembles

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IEC TR 61439-0 ®
Edition 3.0 2022-07
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Low-voltage switchgear and controlgear assemblies –

Part 0: Guidance to specifying assemblies

Ensembles d’appareillage à basse tension –

Partie 0: Recommandations pour la spécification d’ensembles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-4027-4

– 2 – IEC TR 61439-0:2022 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Application of assemblies within the IEC 61439 series . 11
4.1 General . 11
4.2 Assembly design and verification . 11
4.3 Service conditions and interface characteristics . 13
4.4 Application design . 13
5 Electrical system . 13
5.1 General . 13
5.2 Earthing system . 13
5.3 Nominal voltage . 14
5.4 Transient overvoltages . 14
5.5 Unusual voltage transients, temporary overvoltages . 16
5.6 Rated frequency f (Hz) . 16
n
5.7 Additional on-site testing requirements: wiring, operational performance and
function . 17
6 Short-circuit withstand capability . 17
6.1 General . 17
6.2 Prospective short-circuit current at supply terminals I (kA) . 18
cp
6.3 Prospective short-circuit current in the neutral . 19
6.4 Prospective short-circuit current in the protective circuit . 19
6.5 Short-circuit protective device (SCPD) . 19
6.6 Coordination of short-circuit protective devices including external short-
circuit protective device details . 20
6.7 Data associated with loads likely to contribute to the short-circuit current . 21
6.8 Multiple supplies . 21
7 Protection of persons against electric shock . 21
7.1 General . 21
7.2 Basic protection (protection against direct contact) . 21
7.2.1 General . 21
7.2.2 Basic insulation provided by insulating material . 22
7.2.3 Basic insulation by barriers or enclosures . 22
7.3 Fault protection (protection against indirect contact) . 22
7.3.1 General . 22
7.3.2 Requirements for the protective conductor to facilitate automatic
disconnection of the supply . 23
7.3.3 Electrical separation . 24
7.3.4 Class II protection (double or reinforced insulation) . 24
8 Installation environment . 24
8.1 General . 24
8.2 Location type . 24
8.3 Protection against access to hazardous parts, ingress of solid foreign bodies
and ingress of water (IP code) . 25

8.4 External mechanical impact (IK code) . 28
8.5 Resistance to radiation . 29
8.5.1 General . 29
8.5.2 Solar irradiance . 29
8.5.3 Ultraviolet (UV) radiation . 29
8.6 Resistance to corrosion . 29
8.7 Ambient air temperature . 30
8.8 Maximum relative humidity . 30
8.9 Pollution degree . 31
8.10 Altitude . 32
8.11 Electromagnetic compatibility (EMC) . 32
8.12 Special service conditions . 33
8.12.1 General . 33
8.12.2 Climatic conditions . 34
8.12.3 Protection against ingress of solid foreign bodies and ingress of water
(IP code) . 34
8.12.4 Shock, vibration, seismic occurrence and external mechanical impact

(IK code) . 34
8.12.5 Fire and explosion hazards . 34
8.12.6 Exceptional overvoltages . 34
8.12.7 Polluted atmospheres . 35
8.12.8 EMC environment . 35
9 Installation method . 35
9.1 General . 35
9.2 Assembly type . 35
9.3 Portability . 36
9.4 Maximum overall dimensions and weight . 36
9.5 External conductor type(s) . 36
9.6 Direction(s) of external conductors . 37
9.7 External cond
...